
Understanding Probability Distributions and Expected Value

Interactive Video
•
Mathematics
•
9th - 12th Grade
•
Hard
Standards-aligned

Emma Peterson
FREE Resource
Standards-aligned
Read more
7 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main focus of the video tutorial?
Calculating the variance of a random variable
Learning about standard deviation
Finding the expected value of a discrete random variable
Understanding continuous probability distributions
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a discrete probability distribution, what is given in the first row?
The probabilities of each outcome
The values the random variable can assume
The expected value
The cumulative probabilities
Tags
CCSS.HSS.MD.A.2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the formula for expected value involve?
Division of values by probabilities
Multiplication of probabilities
Summation of products of values and probabilities
Summation of probabilities
Tags
CCSS.HSS.MD.A.2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following represents the expected value of a random variable X?
E(X) = sum of probabilities
E(X) = product of values
E(X) = sum of values
E(X) = sum of (value * probability)
Tags
CCSS.HSS.MD.A.2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the expected value calculated in the video?
2.5
0.5
1.9
3.0
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which value is multiplied by a probability of 0.5 in the calculation?
2
1
0
3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of multiplying the third possible value by its probability?
1.0
0.3
0.6
0.2
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